Check out the link below for a great review on the finer points of delivering effective knees. It was written by Matt Caballero of Fit & Fearless, Krav Maga Austin. Danelle and I trained with Matt in Phase B, and he definitely knows his stuff.
Here’s a very important, overarching point from Matt’s post I’d like to highlight:
We can defend all day but striking ends the fight. However, we are more vulnerable when we are striking because in order to strike we must leave our defensive position for a split second.